Mounting for rock drills



July 11, 1939. D. w. HART 2,165,853

i MOUNTING "For: `Rock: DRILLs Filed Feb. 18, 1957. 2 sneets-sheet 1 HI5 ATTORNEY.

D. w. HART MOUNTING FOR ROCK DRILLs July 11, 1939.

- Filed Feb. 1s, 1937 2 sneetssheet 2 4M. q Rm o a# l HIS ATTORNEY.

PatentedJuIy 11, 1939 UNITED STATES PATENT GFFICE Application February18, 1937, Serial No. 126,412

6 Claims.

This invention relates to mountings for rock drills, and moreparticularly to a wheel mounting capable of being readily transported toand from the Wo-rk.

One object of the invention is to enable the rock drill to beexpeditiously and conveniently disposed in position for drilling eithervertical or inclined holes.

Other objects will be in part obvious and in part pointed outhereinafter.

In the accompanying drawings and in which similar reference numeralsrefer to similar parts,

Figure 1 is a front elevation, partly broken away, of a mountingconstructed in accordance with the practice of the invention,

Figures 2 and 3 are transverse views taken through Figure 1 on the lines2-2 and 3--3 looking in the directions indicated by the arrows,

Figure 4 is a side view, in elevation, of the mounting, i Y

Figure 5 is a transverse view taken through Figure 4 on the line 5 5,

Figure 6 is -a View taken through Figure 5 on the line 6--6, and

Figure 'l is a view taken through Figure 1 on the line 1-1.

Referring more particularly to the drawings, the mounting, constructedin accordance with the practice of the invention and designated by 28,comprises a main frame 2|, a pair of co1- umns 22 supported by the mainframe and wheels 23 and 24 to support the mounting.

In Vorder to prevent unauthorized shifting of themounting from a desiredposition the main frame is provided with a series of bearings I8 toaccommodate pins I9 which engage the surface of the material supportingthe mounting. Preferably a shaft I1 is secured to the mounting adjacentthe wheel 24 to provide a grip member which the operator may grasp formoving the mounting from one drilling site to another.

The main frame 2l is of substantially U-shape of which the side members25 are arranged in parallelism and serve as supports for bearings 26 onthe lowermost end of the columns 22. The bearings 26 are slidable alongthe members 25 and are provided with clamping plates 21 and bolts 28whereby they may be clamped to the members 25. y

The columns 22 are preferably disposed perpendicular to the main frameand serve as guides for bearings 29 on the ends of a hollow toolsupporting member or bar 30 which is preferably of U-shape and theintermediate portion 3l of which serves as a pivot for a guide frame 32supporting a rock drill 33, the guide frame 32 being provided withclamping mechanism 34 which grips a cone I 6 carried by the guide framefor clamping it to the bar 30, as is more particularly illustrated inFigure 2. 5

The clamping mechanism may be of well known type comprising a pair ofgrip members I5 and I4 to engage the cone I6. The members I5 and I4 arepivotally connected together, as by a pin I3, and the pressure employedfor clamping the l0 v members I5 and I4 to the cone I6 may be applied bya nut I2 acting against the member I4 and threaded on a bolt II anchoredtothe member I5 and extending through said member I4. In the side of themember I5 is a partly-cylinl5 drical recess I0 to receive the bar 30,and a yoke 9 actuated by nuts 8 threaded on bolts 1 and which bolts maybe carried by the member I5 serves to secure the clamping device 34 tothe bar 30.

In the bearings 29 are apertures 35 to slidably receive the columns 22,and adjacent the bearings 29 are clamps 36 of which the inner surfaces31 conform to the contour of the columns 22. The clamps are pivoted atone end, as by a pin 25 38, to the bearings 23, and in the opposite endsof the clamps are slots 39 to receive eye-bolts 46 pivotally mounted onpins 4I seated in the bearings 29. The eye-bolts carry nuts 42 forforcing the clamps 36 into firm gripping engage- 30 ment with thecolumns 22 to hold the bar 30 fixedly in position on the columns.

In order that the bar 3|] may be readily lowered and raised on thecolumns 22 to enable the rock drill to be placed in an inclinedposition, as illustrated in Figure 4, or in a vertical position, asshown in Figure` 1, the mounting is provided with an actuating device ofwhich an example is more particularly illustrated in Figure 1 and shownas comprising a pair of drums 43 and 44 40 keyed to a shaft 45journalled in the bar 30. Interposed between the drums 43 and 44, andkeyed to the shaft 45, is a worm wheel 46 meshing with a worm 41 havingshaft portions 4B 'and 43 seated in the bar 30. 'Ihe shaft 49 ex- 45tends exteriorly of the bar 30 and carries a crank 50 whereby the worm41 and thus the drums 43 and 44 may be rotated.

Extending through the bar 30 and trained over guide rollers 5I withinthe member30 is a flex- 50y ible member, as for example a cable 52,which is wound upon the drum 43 and an end is anchored to a take-updevice shown as an eyebolt 53 which extends through a bracket 54 mountedupon a. column 22. A nut 55 threaded 55 on the bolt 53 and seating uponthe upper surface of the bracket 54 serves to adjust the bolt 53 tomaintain the correct tension on the cable 52.

To the end that both bearings 29 may be shifted along the columns 22with a minimum degree of friction between their cooperating surfaces acable 56 wound upon the drum 44 is anchored to aneyegbolt 53 supportedby the other column 22;*-a'nd adjustment of the eye-bolt is effected inthe manner of that connected to the cable 52.

The guide frame 32 and the rock drill 33 may be of conventionalconstruction, it. being understood that the rock drill 33A is slidablyinterlocked with the guide frame so that it may readily be moved towardthe work or retracted therefrom. Such movement of the rock drill withrespect to the guide frame may be eiected by any suitable actuatingdevice, as for example a drum 51 and a cable 58 of which an end issecured to the rock drill 33.

In operation, whenever it is desired to drill vertical holes the toolsupporting member is raised, by means of the drums and cables, along thecolumns 22 until the guide frame 32 may be placed in a verticalposition. The clamps 36 are then firmly clamped to the columns 22 andwill support the weights of the bar 30 and the elements carried by thebar. The rock drill V33 may then be set in operation and will descendalong the guide frame 32 in accordance with the penetration of theworking implement into the rock.

When used for drilling vertical holes the columns occupy positionsclosely adjacent the Wheels 23 in order that the holes may be drilledclosely to a vertical rock face. Should it be desired, however, to drillinclined holes into the base of a ledge the plates 2l are loosened andthe columns 22 are moved along the members 25 in the direction of thewheel 24 and again clamped securelyto the members 25. The clamps 36 arethen loosened to permit free movement of the bearings 29 on the columns22 and the drums 43 and 44 are rotated to lower the tool supportingmember 3U and the guide frame 32 may then be inclined to the desiredposition.

After the guide frame and the rock drill have been correctly positionedthe clamping devices 36 and 34 are again tightened to render the entiredevice rigid for a subsequent drilling operation.

I claim:

1. A mounting for rock drills, comprisingv a frame, columns on theyframe, a tool supporting member slidableon the columns, flexible meanson the columns and in the tool supportingmember, means for connectingeach extremity of the flexible means to thev mountingpmeanswithin thetool supporting member to guide kthe flexible means andV seat upon anintermediate portion thereof, guide means on the tool supporting memberadapted to guide longitudinal movement of the rock drill with respect tosaid member, a drum for Winding in any paying out the flexible means toraise and lower the tool supporting member, and means carried by thetool supporting member for clamping said member to the columns.

2. A mounting for rook drills, comprising a frame, columns on the frameand being slidable thereon, a tool supporting member, bearings on thetool supporting member slidable on the column, flexible members on thecolumns having portions thereof lying within the tool supportingmembers, means in the tool supporting member to guide the ilexiblemeans, a drum in the tool supporting member to wind in and pay out theflexible means for raising and lowering the tool supporting member, anda take-up device for the iexible means.

3. A mounting for rock drills comprising a frame, a pair of columnsslidable on the frame, a tubular tool supporting member, bearings onsaid member slidable on the columns, a cable passing through saidtubular member to support said member, an adjustable take up device onthe upper end of each column to secure each end of the cable to acolumn, guide means on the tool supporting member to guide longitudinalmovement of the rock drill with respect to said member, and a drum forthe cable on the tool supporting member to raise and lower the toolsupporting member.

4. A mounting for rock drills comprising a frame, a pair of columnsslidable on the frame, a tubular tool supporting member, bearings onsaid member slidable on the columns, a cable passing through saidtubular member to support said member, an adjustable take up device onthe upper end of each column to secure each end of the cable to acolumn, guide means on the tool supporting member to guide longitudinalmovement of the rock drill with respect to said member, a drum for thecable on the tool supporting member to raise and lower the toolsupporting member, and a second drum and cable to move the rock drilllongitudinal with respect to said tubular tool supporting member.

5. A mounting for rock drills comprising a frame, columns on the frameand being slidable thereon, means to clamp the columns on the frame atany desired position, a tubular supporting member, bearings on the toolsupporting member slidable on the columns, a cable passing through thesupporting member to support said member, means to guide the cable inthe tool supporting member, means at each end of the cable to secure anend thereof to each column, means to guide longitudinal movement of thetool with respect to the tool supporting member,

and means to enable the cable to raise and v lower the tool supportingmember.

6. A mounting for rock drills comprising a frame, columns on the frameand. being slidable thereon, means to clamp the columns on the frame atany desiredfposition, a tubular supporting member, bearings on the toolsupporting member slidable on the columns, a cablepassing through thesupporting member to support same member, meansto guide the cable in thetool supporting member, means at each end of the cable to secure an endthereof to eachv column, means to guide longitudinal ymovement of thetool with respect to the tool supporting member, means to enable thecable to raise vand lower the tool supporting member, and means to movethe tool withrespect to the tool supporting member.

DUDLEY W.v HART

